Slag-furnace



3 Sheets-Sheet 1.

(No Model.)

0. B. PEGK.

SLAG FURNACE.

No. 379,720. Patented Mar. 20, 1888. f?"

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4' a We rrfi N. PETERS. PhoidLflhugmpher. Washington, uv c.

(No Model.)

3 Sheets-Sheet 3. O. B. PEOK.

SLAG FURNACE.

Patented Mar. 20, 1888.

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N PETERS. Phmn-Lnhegnpber, Washinglun, 132G UNITED STATES PATENT rricn.

ORRIN B. PECK, OF CHICAGO, ILLINOIS.

SLAG-FURNACE.

SPECIFICATION forming part of Letters Patent No. 379,720, dated March20, 1888.

Application filed December 6, 1887. Serial No. 257,0 1. (No model.)

To all whom it may concern.-

Be it known that I, ORRIN B. PEOK, a citizen of the United States,residing at Chicago, Illinois, have invented certain new and usefulImprovements in Slag-Furnaces, of which the following is aspecification.

The object of my invention is to make a furnace in which the heated ormolten slag and other material, which is usually allowed to cool aboutsmelting-furnaccs without being utilized, may be employed in thegeneration of steam, and to provide more convenient and economical meansfor the transportation of such heated or molten slag and other materialfrom the smelting-furnace to the place of final deposit; and myinvention consists in the features and details of constructionhereinafter described and claimed. 1

In my present improvements I have endeavored to make a furnace in whichthe slag or other material may preferably deliver itself from thesmelting-furnace or place where it is heated into the slag-furnace orupon a covered slag-carrier, so that the trouble and expense ofintermediate handling or manipulation may be avoided and the bestresults obtained.

In the drawings, Figure 1 is a top view of my improved slag-furnace,showing particularly the location of the smelting-furnaces and theslag-furnace, thelatter being underground and covered up, except aportion at one end. Fig. 2 is a top view of a portion of the slagfurnacewith the covering removed. Fig. 3 is a top View of the slag-furnace, andshowing the tubular boiler in which wateris heated and con- Verted intosteam, taken in the line w w of Fig. 4. Fig. at is a longitudinalvertical section taken in the line a: 00 of Fig. 3, with all theboilerpipes in place. Fig. 5 is an end elevationof the slag-furnace, andshowing the steam-generating boiler, taken in the line y y of Fig. 3,looking in the direction of the arrows. Fig. 6 is a transverse verticalsection taken in the line zz of Fig. 1, and Fig. 7 is an end View of themud roller or mop shown at the left hand of Fig. 4.

In the drawings, A A are the locations of smelting-furnaces; B B,troughs by which the slag is carried off; C O, receivers into which theslag is carried; D, a spout or conduit in the receiver, through whichthe slag flows into the slag-furnace; D, a hole in the cover to admitthe slag; E, a traveling slag carrier or apron on which the slag fallsfrom the smelting or slag-producing furnace; F, a sprocketwheel by whichthe traveling carrier or-apron is carried forward; G, a sprocket-chain;H, a roller-chain on which the movable apron moves as it is carriedforward by the sprocket-chain; I I, stationary rollers beneath thesprocketwheel, on which the traveling apron moves along the under side;J J, the hollow heads of the boiler; K K, the tubes of the boiler, inwhich the water is heated and converted into steam; L L, the pipes fromthe hollow heads of the boiler,which carry steam into a commonpipe,whence it is conveyed to the cylinder or place of use; M, thiscommon pipe; N, the mud roller or mop, and O a bridge or cover over theboiler and carrier supported-independently of them.

In making my improved slag furnace and carrier I prefer to locate itbeneath the surface of the ground, or under an independently-supportedcovering or bridge, so that the heated or molten slag fromsmelting-furnaces may be carried to it either directly or from thereceiver, placed between the smelting-furnace and the slag-furnace, andso that it will not afford an obstruction to the surface operationsaround the base of the smelting-furnace. This trench or excavationshould of course be located with reference to the location of thesmelting-furnaces.

In Fig. 1 I have shown the location of several smelting-furnaces with myslagfurnace located alongside of the same. I preferably dig a trench ofsufficient depth and size to contain the parts, with room to admit ofaccess to the same, and wall it up in any suitable manner. In Fig. 6 Ihave shown this trench considerably wider than the slag-furnace locatedtherein.

I arrange within the trench or under the bridge 0 a slag-carryingdevice, preferably an apron carrier, E, which is particularly shown inFigs. 3 and 4, and is composed of a series of plates or slats, 6, madeof cast-iron or othersuitablc material,oonnected by thelink c, andresting at its upper orslag-carrying side on the rollers H, supported bythe rails H, and at its lower side resting on the rollers I, the wholebeing supported by a suitable framework or structure which has one ormore suit able sprocket-wheels, F F, mounted upon suitable journaledshafts at its ends, around which I pass the apron E, thus making acarrying-- a suitable boiler, preferably of a tubular design, asshown-especially in Figs. 3, 4, and 5, above the carrier or apron,supported in any convenient way, and provide it with an exteriorcovering, so that the heat of the slags on the carrier that is radiatedup to the boiler will be confined by the covering, and thus be used inheating the water and generating steam in the boiler.

I preferably cover the conveyer and boiler, or entire slag-furnace, witha bridge or covering 0, supported independently of the slagearryingdevice, and fixed or stationary in relationto them; and while I haveespecially described and shown a traveling slag-carrying device as anapron, I do not wish to confine myself to this particular design, as Imay employ various mechanically-arranged devices having travelingslag-carrying surfaces. It is apparent that any pan or vessel capable'of holding hot or molten slags may be passed or caused to travel underor through the heating-chamber of the boiler, and for this reason I wishto cover, broadly, all devices capable of carrying slag in this manner.

As the heated ormolten slag from the smelting-furnace flows off,it willfall into the receivers G, where receivers are employed, which willpermit the metal that it may contain to sink to the bottom,while theslag will flow out the spout or conduit D and pour down by its ownweight through the hole D in the cover of the slag-furnace onto thetraveling apron or other carrying device E. As it flows onto thiscarrier it will be carried forward by the constant moving forward of thecarrying device, so that it will pass beneath. the waterpipes of thesteam-generating boiler. As it passes on beneath these pipes of theboiler it will radiate its heat, so as to convert the water into steam,and as it reaches the end of the carrier or apron it will be dumped ordischarged from it as the sections 6 pass down around the end of thesprocket-wheel at the farther end of the slag-furnace. To carry off theslag as it is thus discharged, I have arranged a supplemental travelingcarrier or apron, S. (Shown in Fig. 1.) ,This carrier may be constructedand operated in all material respects like the one above described, orin any other convenient manner. As the slag is dumped upon it, it iscarried forward, and, if desired, upward, so as to be delivered at thesurface of the ground in any proper receptacle to receive it and conveyit away, or delivered at any other place of deposit; or, if desired,this supplemental carrying-apron may be dispensed with and cars or otherreceptacles run in beneath the end of the furnace in proper position toreceive the slag as it is discharged from the traveling carrier or apronE; orthis carrier E may be extended to other desired place of depositfor the slags, or, when other designs are supplemented for the one heren particularly described that will admlt of it, they may be used toserve the purpose of both the carriers E and S.

If desired, the receiversO may be dispensed with and the slag and othermaterial discharged directly from the smelting furnace upon thetraveling carrier or apron E of the slag-furnace, though I prefer theuse of an 1ntermediate receiver, as above described.

When a traveling apron is used, to prevent it from being destroyed orinjured by the heat of the slag, and to prevent the slag from adheringto it, I have arranged a mud roller or mop,N, (shown in Figs. 4 and 7,)preferably at the point where the traveling apron begins to enterbeneath the pipes of the boiler, and before it reaches the point wherethe molten slag is poured upon it. This mop or roller is mounted upon ashaft, as shown in Fig. 7, which may be rotated by any convenient motivepower. In its rotation it rubs agalnst the surface of the apron andspreads a coating of mud or other suitable material upon it to preventthe slag from adhering thereto. Of course it will be understood thatthis roller may be supplied with the coating material in any suitablemanner, as by permittinga stream of it to constantly flow upon itssurface to be spread upon the apron.

My invention is also applicable to other furnaces besides smelting orslag-producing furnaces, and to factories where a large quantity ofheated or molten matter capable of heating a boiler and generating steamis now allowed to cool without being utilized for any heating purposes.I

What I regard as new, and desire to secure by Letters Patent, is-

1. The combination of a smelting or slagproduoing furnace, asteam-generating boiler, one or more traveling slag-carrying devices, asdescribed, and means for conveying the slag from the slag-producingfurnace to the said slag carrying device, substantially as described.

2. The combination of a smelting or slagproducing furnace, asteam-generating boiler, one or more slag-carrying devices, asdescribed, a trench or conduit in which said boiler is located, andmeans for conveying slag from the smelting-furnace to the slag-carryingvessels, substantially as described.

3. The combination of a smelting or slagproducing furnace, asteam-generating boiler, one or more slag-carrying vessels, a bridgeover the same supported independently of such slag-carriers, and spoutsor conduits for conveying slags from the smelting-furnace to the saidcarrying-vessels, substantially as described.

4. The combination of a slag-producing furnace, a travelingslag-carrying device located ICO in a trench or conduit, a bridge orcovering over the same supported independently of the slag-carrier, andspouts or conduits for conveying the slag from the slag-producingfurnace to the slagcarrying device, substantially as described.

5. In a slag-furnace, the combination of a smelting or other furnace toproduce slag, a receiver into which the molten slag is conveyed, asteanrgenerating boiler, a traveling slag-carrying device, and means foroperating the same, substantially as described.

6. In a slag-furnace, the combination of a smelting or other furnace toproduce slag, a receiver into which the molten slag is con- I

